package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.dto.DishDTO;
import com.sky.dto.DishPageQueryDTO;
import com.sky.entity.Dish;
import com.sky.entity.DishFlavor;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.mapper.DishFlavorMapper;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealDishMapper;
import com.sky.result.PageResult;
import com.sky.service.DishService;
import com.sky.vo.DishVO;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.List;

@Slf4j
@Service
public class DishServiceImpl implements DishService {
    @Autowired
    private DishMapper dishMapper;
    @Autowired
    private DishFlavorMapper dishFlavorMapper;
    @Autowired
    private SetmealDishMapper setmealDishMapper;
    @Autowired
    private DishService dishService;

    //新增菜品
    @Override
    @Transactional
    public void saveWithFlavor(DishDTO dishDTO) {
        Dish dish = new Dish();
        BeanUtils.copyProperties(dishDTO, dish);//属性拷贝
        //向菜品表插入一条数据
        dishMapper.insert(dish);

        //获取insert语句生成的主键值
        Long dishId=dish.getId();

        //向口味表插入n条数据
        List<DishFlavor> flavors=dishDTO.getFlavors();

        if (flavors!=null && flavors.size()>0){
            flavors.forEach(dishflavor->{
                dishflavor.setDishId(dishId);
            });
            //批量插入
            dishFlavorMapper.insertBatch(flavors);
        }
    }

    //菜品分页查询
    @Override
    public PageResult pageQuery(DishPageQueryDTO dishPageQueryDTO) {
        PageHelper.startPage(dishPageQueryDTO.getPage(),dishPageQueryDTO.getPageSize());
        //传给前端的数据封装使用VO
        Page<DishVO> page=dishMapper.pageQuery(dishPageQueryDTO);

        return new PageResult(page.getTotal(),page.getResult());
    }

    //菜品批量删除
    @Override
    @Transactional//事务注解，保证数据的一致性
    public void deleteBatch(List<Long> ids) {
        //判断当前菜品是否能够删除--是否存在起售中的菜品
        for (Long id : ids) {
            Dish dish=dishMapper.getById(id);
            if (dish.getStatus()==1){
                //当前菜品处于起售中（抛出异常）
                throw new DeletionNotAllowedException("菜品在售");
            }
        }
        //判断当前菜品是否被套餐关联
        List<Long> setMealIds=setmealDishMapper.getSetmealIdsByDishIds(ids);
        if (setMealIds!=null && setMealIds.size()>0){
            //当前存在套餐关联
            throw new DeletionNotAllowedException("当前菜品存在菜品关联");
        }
//        //删除菜品表中的菜品数据
//        for (Long id : ids) {
//           dishMapper.deleteById(id);
//            //删除菜品关联的口味数据
//            dishFlavorMapper.deleteByDishId(id);
//        }
        //根据菜品id集合删除对应菜品数据
        //sql:delete from dish where id=(?,?,?,?..)
        dishMapper.deleteByIds(ids);
        //根据菜品id集合删除对应口味数据
        //sql:delete from dish_flavor where dish_id=(?,?,?,?..)
        dishFlavorMapper.deleteByDishIds(ids);

    }

    @Override
    public DishVO getByIdWithFlavor(Long id) {
        //根据id查询菜品数据
        Dish dish=dishMapper.getById(id);
        //根据id查询口味数据
        List<DishFlavor> dishFlavors=dishFlavorMapper.getBydishId(id);
        //将查询到的数据封站成VO
        DishVO dishVO=new DishVO();
        BeanUtils.copyProperties(dish,dishVO);
        dishVO.setFlavors(dishFlavors);

        return dishVO;
    }

    @Override
    public void updateWithFlavor(DishDTO dishDTO) {
        Dish dish=new Dish();
        BeanUtils.copyProperties(dishDTO,dish);
        //修改菜品表基础信息
        dishMapper.update(dish);
        //删除菜品表原有的口味数据
        dishFlavorMapper.deleteByDishId(dishDTO.getId());
        //重新插入新的数据
        List<DishFlavor> flavors=dishDTO.getFlavors();
        if (flavors!=null && flavors.size()>0){
            flavors.forEach(dishflavor->{
                dishflavor.setDishId(dishDTO.getId());
            });
            //批量插入
            dishFlavorMapper.insertBatch(flavors);
        }
    }

    @Override
    public List<Dish> getDishByCategory(Long categoryId) {
        List<Dish> dish=dishMapper.getDishByCategory(categoryId);
        return dish;
    }
}
